﻿<?php
$t1 = microtime(1);

$a = '';
for($i=1; $i<=2000000; $i++) {
	$b = '凤凰网';
	
	//$a = "北京$b";
	//$a = '北京'.$b;
	//$a = "北京凤凰网";
	$a = '北京凤凰网';
	
	$a = <<<AAAd
北京凤凰网
AAA;
}

echo round(microtime(1) - $t1, 5);
?>